HUUM Drop Sauna Heater Electric
Wall-mounted HUUM DROP electric sauna heater, 4.5–9 kW for 106–460 cu ft rooms, with a water-drop basket for about 121 lb of stones
- Red Dot award-winning water-drop design
- About 121 lb of stones for soft, even steam
- App control with the HUUM UKU Wi-Fi
What Customers Say About This Product
“Showpiece performance with everyday convenience Ordered the HUUM Drop for our 7x7 cedar sauna and it’s been fantastic. Delivery was quick and everything arrived spotless.…”
“Elegant heater, smooth delivery Arrived fast and well-packed; not a scratch. Mounting to the wall was straightforward, and it cleaned up the floor space in…”
“Soft steam and beautiful design Upgraded to the 9 kW for a taller ceiling. Once warmed, the thick stone bed gives silky steam without spikes.…”
- Description
- Specifications
- Installation
- What's Included
- Documents
- Warranty
What is the HUUM DROP electric sauna heater?
The HUUM DROP is a wall-mounted electric sauna heater from HUUM of Estonia, built around a water-drop-shaped stainless-steel stone basket that holds about 121 lb (55 kg) of stones. It comes in 4.5, 6, 7.5 and 9 kW for sauna rooms from 106 to 460 cu ft, runs on 240 V, and needs a separate HUUM UKU control and four 33 lb boxes of stones. The DROP won a Red Dot design award in 2015.
Inspired by a drop of water, the DROP softens the straight lines of a classic sauna. The stones sit in direct contact with the heating elements and most of them stay exposed, which HUUM says gives a longer, milder heat when you ladle water on them.
How do you control the HUUM DROP?
The DROP has no built-in controls: it runs from a HUUM UKU control. UKU Local heats the sauna from the wall panel; UKU Wi-Fi adds the HUUM app, so you can start the sauna on your way home and schedule sessions ahead. Any UKU runs every DROP size without an extension box. Topture also sells the DROP as a package with the UKU control and stones included; the HUUM DROP collection has all four sizes.
HUUM DROP key features
- Water-drop design, Red Dot design award 2015
- Wall-mounted on the supplied mounting plate, or set partly into the bench with the HUUM Flange D embedding flange
- About 121 lb (55 kg) of stones in direct contact with the heating elements
- Stainless-steel body and heating elements
- Designed and made in Estonia
- SGS listed to UL 60335-1 and CAN/CSA-C22.2 No. 60335-1
Which HUUM DROP size fits my sauna?
Choose the DROP by the volume of your sauna room. For every square foot of uninsulated brick, tile or glass wall, add 3.3 cu ft to the room volume before choosing. HUUM's warranty does not cover a heater whose output does not match the room volume.
| 4.5 kW | 6 kW | 7.5 kW | 9 kW | |
|---|---|---|---|---|
| HUUM model | DROP 4 | DROP 6 | DROP 7 | DROP 9 |
| Sauna room volume | 106–248 cu ft (3–7 m³) | 177–318 cu ft (5–9 m³) | 248–389 cu ft (7–11 m³) | 283–460 cu ft (8–13 m³) |
| Current at 240 V | 18.75 A | 25 A | 31.25 A | 37.5 A |
| Circuit breaker | 30 A | 30 A | 40 A | 50 A |
| Minimum wire size | 10 AWG | 10 AWG | 8 AWG | 8 AWG |
| Heater weight | 24.3 lb | 24.3 lb | 26.5 lb | 26.5 lb |
| HUUM part number | H1001052 | H1001062 | H1001082 | H1001072 |
HUUM DROP dimensions and stones
| Dimensions | 23.3" H × 15.35" W × 13.2" D (590 × 390 × 335 mm) |
|---|---|
| Stones | About 121 lb (55 kg) of 2–4" (5–10 cm) stones: 4 boxes of HUUM Stones 24 (33 lb each) |
| Weight with stones | About 143 lb, carried by the wall |
| Power supply | 240 V, single phase |
| Heat-up time | About one hour in a well-insulated, correctly sized room (HUUM) |
| Materials | Stainless-steel body and heating elements |
| Made in | Estonia |
| Warranty | 3 years private use, 1 year commercial use (HUUM); heating elements, stones and sensors are excluded |
How is the HUUM DROP installed?
The DROP hangs on the supplied mounting plate and is secured with a safety bolt. With the HUUM Flange D it can instead sit partly inside the bench or floor, with at least 14 3/4" (375 mm) of the heater above the bench.
HUUM's DROP manual says the electrical connection must be made by a licensed electrician, on its own circuit, with a heat-resistant power cable (no PVC insulation) and crimped wire ends. Your electrician sizes the breaker and wire from the manual that ships with the heater and your local code.
HUUM DROP safety distances
Keep at least these distances from the HUUM DROP to walls, benches and anything that can burn. The letters match the drawing.
| 4.5 kW | 6 kW | 7.5 kW | 9 kW | |
|---|---|---|---|---|
| A | 3 15/16" (100 mm) | 4 23/32" (120 mm) | 5 1/2" (140 mm) | 5 29/32" (150 mm) |
| B | 23 7/32" (590 mm) | 24 13/16" (630 mm) | 26 3/8" (670 mm) | 27 5/32" (690 mm) |
| C | 17 1/8" (435 mm) | 17 29/32" (455 mm) | 18 11/16" (475 mm) | 19 3/32" (485 mm) |
| D | 6 11/16" (170 mm) | 7 15/32" (190 mm) | 8 9/32" (210 mm) | 8 21/32" (220 mm) |
- A: minimum distance from the heater to a side wall, and to a bench or other obstruction beside or in front of it
- B: minimum width from a side wall to a bench or obstruction on the far side of the heater
- C: minimum distance from the wall behind the heater to a bench or obstruction in front of it
- D: minimum distance from an adjoining corner wall to the edge of the mounting plate
- E: at least 12 7/32" (310 mm) from the floor to the bottom of the mounting plate
- At least 47 1/4" (1,200 mm) from the top of the heater to the ceiling, and 3 15/16" (100 mm) from its bottom to the floor
HUUM requires a sauna room at least 75" tall (79–91" recommended) with 44–51" from the top bench to the ceiling.
Stacking and caring for the stones
Stack the stones by hand so they cover the elements completely; a sparsely filled basket is a fire hazard, and visible elements void the safety distances. HUUM recommends checking the stones after 100 hours of use (or yearly), replacing cracked stones after 200 hours and replacing all of them after 400 hours.
HUUM DROP videos
What's in the box with the HUUM DROP?
- HUUM DROP electric sauna heater (4.5, 6, 7.5 or 9 kW)
- Mounting plate and safety bolt
- Reflector
- Heating-element spacers and element retainer
- Heat diverter (9 kW)
- Installation and user manual
What you need separately
- A HUUM UKU control: UKU Local or UKU Wi-Fi (no extension box needed for any DROP)
- 4 boxes (132 lb) of HUUM Stones 24, 2–4" rounded stones
- A heat-resistant power cable, connected by a licensed electrician
- Optional: HUUM Rail D safety rail, DROP drip tray or Flange D embedding flange
HUUM warranty periods
HUUM's limited warranty (Limited Warranty Terms and Conditions, US, v2) covers new HUUM products bought from HUUM or its authorized dealers, such as Topture, against defects in materials and workmanship. The period starts on the date the end user buys the product.
| HUUM product | Private use | Commercial use |
|---|---|---|
| Electric sauna heaters | 3 years | 1 year |
| Wood-burning sauna stoves | 3 years | 1 year |
| Control units (UKU) | 3 years | 1 year |
| Spare parts | 1 year | 1 year |
HUUM counts as commercial use a business using the product commercially, a private owner using it commercially, or a private owner using it for more than 1,500 hours in 12 months.
What the warranty does not cover
- Heating elements of electric heaters
- HUUM accessories, such as rails, reflectors, flanges, protective bedding and chimney parts
- Door glass and ash grate of wood-burning stoves
- Sauna stones
- All controller sensors
- Damage from a heater that is the wrong size for the room, from unsuitable stones, or from installation, use or maintenance that does not follow HUUM's manuals
What keeps the warranty in effect
- Inspect the product when it arrives and report any visible damage within 7 days, with photos, before installing it.
- Install it following HUUM's manual and local building, electrical and fire codes. An electric product must be connected by a licensed electrician, with proof of the installation.
- Report a defect within 30 days of finding it. For products bought from Topture, report it to Topture, which passes the claim to HUUM and helps with troubleshooting.
